Which is bigger, the Seiko 5 Sports SKX series or the Synchron 70s Military?

The Synchron 70s Military wears larger at 42mm versus 38mm for the Seiko 5 Sports SKX series — a 4mm difference across the dial.

Which has better water resistance, the Seiko 5 Sports SKX series or the Synchron 70s Military?

The Synchron 70s Military is rated to 300m versus 10m for the Seiko 5 Sports SKX series.

Which has a longer power reserve, the Seiko 5 Sports SKX series or the Synchron 70s Military?

The Seiko 5 Sports SKX series carries a 41-hour power reserve against 40 hours on the Synchron 70s Military.

What movement does the Seiko 5 Sports SKX series run compared to the Synchron 70s Military?

Both watches run automatic movements — the Seiko 5 Sports SKX series uses the 4R36 and the Synchron 70s Military uses the Sellita SW200.

Side by side

Seiko 5 Sports SKX seriesvsSynchron 70s Military

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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Seiko 5 Sports SKX series

srpk29

MSRP $350

Synchron 70s Military

At a glance

12 of 29 specs differ

Diameter

5 Sports SKX series38mm

70s Military42mm

Power Reserve

5 Sports SKX series41h

70s Military40h

Water Resistance

5 Sports SKX series100m

70s Military300m

MSRP

5 Sports SKX series$350

70s Military—

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Crystal

Hardlex

Sapphire

Lume

LumiBrite on hands and index(es)

None

Movement

3 specs

Caliber

4R36

Sellita SW200

Power Reserve

41h

40h

Jewels

Pricing

1 specs

MSRP

$350

—

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Seiko 5 Sports SKX seriesvsSynchron 70s Military

At a glance

Full specifications

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